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Extensive selection of accuracy grades

Accuracy standard and preload

Three accuracy grades are available: ultra super precision P3, super precision P4, and high precision P5.
Slight preload Z1 and medium preload Z3 are available for preload, which can be selected for specific applications.

Table 2 Accuracy standard Ultra super Super unit: µm Fig. 11 Mounting width (W2) and running parallelism
precision precision CD
Accuracy grade High
P3 P4 precision H
Items
Assembly height H ±10 ±10 P5 W2
Variation of assembly height H B
(All slides on a pair of rails) 3 5 ±20 Fig. 12 Mounting width (W3) and running parallelism
Mounting width W2 or W3 CD
Variation of mounting width W2 or W3 7
(All slides on datum rails) H
Running parallelism of face C against face A ±15 ±15 ±25
Running parallelism of face D against face B 3 7 10 W3
B
Refer to Table 3 for tolerance.
See Fig. 11 and Fig.12.

Table 3 Running parallelism tolerance unit: µm

Accuracy grade P3 P4 P5
Total rail length (mm)
2 2 4
Over—200 or less00 2 2.5 5
200—25000 2 2.5 5
250—31500 2 3 6
315—40000 2 3 6
400—50000 2 3.5 7
500—63000 2 4.5 8
630—80000 2.5 5 9
800—1 000 3 6 10
4 7 11
1 000—1 250 4.5 8 13
1 250—1 600 5 10 15
1 600—2 000 6 11 17
2 000—2 500 9 16 23
2 500—3 150
3 150—4 000

Table 4 Preload and rigidity

HA Type HS Type

Preload (N) Rigidity (N/µm) Preload (N) Rigidity (N/µm)

Model No. Slight preload Medium preload Slight preload Medium preload Model No. Slight preload Medium preload Slight preload Medium preload

(Z1) (Z3) (Z1) (Z3) (Z1) (Z3) (Z1) (Z3)

HA25 735 2 990 635 1 030 HS15 98 785 260 530

HA30 1 030 4 400 880 1 270 HS20 147 1 030 305 600

HA35 1 470 6 100 1 030 1 620 HS25 245 1 620 385 735

HA45 1 960 8 150 1 230 2 060 HS30 390 2 550 505 965

HA55 3 150 13 100 1 520 2 450 HS35 590 3 550 610 1 140

Specification number

The specification number indicates main specifications through numbers and codes. The specification number is
used until the final reference number, indicated in a specification drawing, is assigned upon confirming
specifications with the user. The reference number consists of the specification code, the design serial number,
and additional information as applicable.

Example: HS 30 1000 AL C 2 - ✽ ✽ K5 1 -

Series code No code : One rail
Size No. 11 : Two rails (*2)
Rail length, mm
Preload code
1: Slight preload 2: Medium preload

Ball slide shape code Accuracy grade
AN: Square, AL: Low square, EM: Flange Without K1 P3: Ultra super precision, P4: Super precision,

(✽1) Material and surface treatment code P5: High precision
C: Special high-carbon steel With K1 K3: Ultra super precision, K4: Super precision,
K: Stainless steel
D: Special high-carbon steel + Surface treatment K5: High precision
H: Stainless steel + Surface treatment
(✽2) Design serial number

Number of ball slides per rail

(✽1) Surface treatment is provided by low-temperature black chrome plating (black surface coating by electrolytic protection against corrosion).
Optional low-temperature chrome plating treatment that further improves anticorrosion properties by means of fluorocarbon resin coating is also available.

(✽2) Design serial number is appended to delivery reference number (model number), which in turn does not reflect the final number.

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